Answer this question truthfully
### Question: What causes Peripheral neurofibromatosis or Neurofibromatosis type 1?
### Response: NF1 is an inherited disease. If either parent has NF1, each of their children has a 50% chance of having the disease.
NF1 also appears in families with no previous history of the condition, as a result of a new gene change (mutation) in the sperm or egg. NF1 is caused by abnormalities in a gene for a protein called neurofibromin.